Olenna sits next to 3 phonetic neighbors — Elena, Ellena, and Alena are the closest matches by sound. Most share Olenna's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"torch, shining light"
"ash tree meadow"
"then, so, well then (conversational)"
"word, speech"
"muddy, boggy (alternate etymological theory)"
"song (from Old French 'chant')"
"festive occasion, day of rest"
"creative variant of Kimora"
"fresh, vital, full of life"
"flowing stream"
"vision, sight"
"peace"
"favor, grace"
"pledged to God"
"beautiful voice"
"God is my refuge, noble"
"woman from Magdala"
"honor, compassion"
"pale or fair woodland glade"
Similar sound: These names share phonetic patterns with Olenna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Olenna.
Rhythm: Olenna is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.